As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, FLIGHT CREW RECEIVED A BLEED 1 LEAK MESSAGE ON THE EICAS. MAINTENANCE INSPECTED THE AIRCRAFT AND REMOVED AND REPLACED A DUCT ASSEMBLY ON THE DUAL HEAT EXCHANGER. OPERATIONAL CHECK OF THE SYSTEM CHECKED GOOD FOLLOWING THE REPAIR.